// Copyright 2016 David Galles, University of San Francisco. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other materials
// provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY David Galles ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIIBTED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// The views and conclusions contained in the software and documentation are those of the
// authors and should not be interpreted as representing official policies, either expressed
// or implied, of the University of San Francisco


// Constants.


RadixTree.NODE_WIDTH = 60;

RadixTree.LINK_COLOR = "#007700";
RadixTree.HIGHLIGHT_CIRCLE_COLOR = "#007700";
RadixTree.FOREGROUND_COLOR = "#007700";
RadixTree.BACKGROUND_COLOR = "#CCFFCC";
RadixTree.PRINT_COLOR = RadixTree.FOREGROUND_COLOR;
RadixTree.FALSE_COLOR = "#FFFFFF"
RadixTree.WIDTH_DELTA = 50;
RadixTree.HEIGHT_DELTA = 80;
RadixTree.STARTING_Y = 80;
RadixTree.LeftMargin = 300;
RadixTree.NEW_NODE_Y = 100
RadixTree.NEW_NODE_X = 50;
RadixTree.FIRST_PRINT_POS_X = 50;
RadixTree.PRINT_VERTICAL_GAP = 20;
RadixTree.PRINT_HORIZONTAL_GAP = 50;


function RadixTree(am, w, h) {
    this.init(am, w, h);
}

RadixTree.prototype = new Algorithm();
RadixTree.prototype.constructor = RadixTree;
RadixTree.superclass = Algorithm.prototype;

RadixTree.prototype.init = function (am, w, h) {
    var sc = RadixTree.superclass;
    this.startingX = w / 2;
    this.first_print_pos_y = h - 2 * RadixTree.PRINT_VERTICAL_GAP;
    this.print_max = w - 10;

    var fn = sc.init;
    fn.call(this, am);
    this.addControls();
    this.nextIndex = 0;
    this.commands = [];
    this.cmd("CreateLabel", 0, "", 20, 10, 0);
    this.cmd("CreateLabel", 1, "", 20, 10, 0);
    this.cmd("CreateLabel", 2, "", 20, 30, 0);
    this.nextIndex = 3;
    this.animationManager.StartNewAnimation(this.commands);
    this.animationManager.skipForward();
    this.animationManager.clearHistory();
}


RadixTree.prototype.findIndexDifference = function (s1, s2, id, wordIndex) {
    var index = 0;
    this.cmd("SetText", 2, "Comparing next letter in search term \n to next letter in prefix of current node");

    while (index < s1.length && index < s2.length) {
        this.cmd("SetHighlightIndex", 1, index);
        this.cmd("SetHighlightIndex", id, index);
        this.cmd("Step");
        this.cmd("SetHighlightIndex", 1, -1);
        this.cmd("SetHighlightIndex", id, -1);

        if (s1.charAt(index) == s2.charAt(index)) {
            index++;
        } else {
            break;
        }
    }
    return index;
}


RadixTree.prototype.addControls = function () {
    this.insertField = addControlToAlgorithmBar("Text", "");
    this.insertField.onkeypress = this.returnSubmit(this.insertField, this.insertCallback.bind(this), 12, false);
    this.insertButton = addControlToAlgorithmBar("Button", "添加");
    this.insertButton.onclick = this.insertCallback.bind(this);
    this.deleteField = addControlToAlgorithmBar("Text", "");
    this.deleteField.onkeydown = this.returnSubmit(this.deleteField, this.deleteCallback.bind(this), 12);
    this.deleteButton = addControlToAlgorithmBar("Button", "删除");
    this.deleteButton.onclick = this.deleteCallback.bind(this);
    this.findField = addControlToAlgorithmBar("Text", "");
    this.findField.onkeydown = this.returnSubmit(this.findField, this.findCallback.bind(this), 12);
    this.findButton = addControlToAlgorithmBar("Button", "搜索");
    this.findButton.onclick = this.findCallback.bind(this);
    this.printButton = addControlToAlgorithmBar("Button", "打印");
    this.printButton.onclick = this.printCallback.bind(this);
}

RadixTree.prototype.reset = function () {
    this.nextIndex = 3;
    this.root = null;
}

RadixTree.prototype.insertCallback = function (event) {
    var insertedValue = this.insertField.value.toUpperCase()
    insertedValue = insertedValue.replace(/[^a-z]/gi, '');

    if (insertedValue != "") {
        // set text value
        this.insertField.value = "";
        this.implementAction(this.add.bind(this), insertedValue);
    }
}

RadixTree.prototype.deleteCallback = function (event) {
    var deletedValue = this.deleteField.value.toUpperCase();
    deletedValue = deletedValue.replace(/[^a-z]/gi, '');
    if (deletedValue != "") {
        this.deleteField.value = "";
        this.implementAction(this.deleteElement.bind(this), deletedValue);
    }
}


RadixTree.prototype.printCallback = function (event) {
    this.implementAction(this.printTree.bind(this), "");
}


RadixTree.prototype.printTree = function (unused) {

    this.commands = [];

    if (this.root != null) {
        this.highlightID = this.nextIndex++;
        this.printLabel1 = this.nextIndex++;
        this.printLabel2 = this.nextIndex++;
        var firstLabel = this.nextIndex++;
        this.cmd("CreateLabel", firstLabel, "Output: ", RadixTree.FIRST_PRINT_POS_X, this.first_print_pos_y);
        this.cmd("CreateHighlightCircle", this.highlightID, RadixTree.HIGHLIGHT_CIRCLE_COLOR, this.root.x, this.root.y);
        this.cmd("SetWidth", this.highlightID, RadixTree.NODE_WIDTH);
        this.cmd("CreateLabel", this.printLabel1, "Current String: ", 20, 10, 0);
        this.cmd("CreateLabel", this.printLabel2, "", 20, 10, 0);
        this.cmd("AlignRight", this.printLabel2, this.printLabel1);
        this.xPosOfNextLabel = RadixTree.FIRST_PRINT_POS_X;
        this.yPosOfNextLabel = this.first_print_pos_y;
        this.printTreeRec(this.root, "");

//	        this.cmd("SetText", this.printLabel1, "About to delete");
//		this.cmd("Step")

        this.cmd("Delete", this.highlightID);
        this.cmd("Delete", this.printLabel1);
        this.cmd("Delete", this.printLabel2);
        this.cmd("Step")

        for (var i = firstLabel; i < this.nextIndex; i++) {
            this.cmd("Delete", i);
        }
        this.nextIndex = this.highlightID;  /// Reuse objects.  Not necessary.
    }
    return this.commands;

}


RadixTree.prototype.printTreeRec = function (tree, stringSoFar) {
    if (tree.wordRemainder != "") {
        stringSoFar = stringSoFar + tree.wordRemainder;
        var nextLabelID = this.nextIndex++;
        this.cmd("CreateLabel", nextLabelID, tree.wordRemainder, tree.x, tree.y, 0);
        this.cmd("MoveToAlignRight", nextLabelID, this.printLabel2);
        this.cmd("Step");
        this.cmd("Delete", nextLabelID);
        this.nextIndex--;
        this.cmd("SetText", this.printLabel2, stringSoFar);
    }
    if (tree.isword) {
        var nextLabelID = this.nextIndex++;
        this.cmd("CreateLabel", nextLabelID, stringSoFar + "  ", 20, 10, 0);
        this.cmd("SetForegroundColor", nextLabelID, RadixTree.PRINT_COLOR);
        this.cmd("AlignRight", nextLabelID, this.printLabel1, RadixTree.PRINT_COLOR);
        this.cmd("MoveToAlignRight", nextLabelID, nextLabelID - 1);
        this.cmd("Step");

        this.xPosOfNextLabel += RadixTree.PRINT_HORIZONTAL_GAP;
        if (this.xPosOfNextLabel > this.print_max) {
            this.xPosOfNextLabel = RadixTree.FIRST_PRINT_POS_X;
            this.yPosOfNextLabel += RadixTree.PRINT_VERTICAL_GAP;
        }


    }
    for (var i = 0; i < 26; i++) {
        if (tree.children[i] != null) {
            this.cmd("Move", this.highlightID, tree.children[i].x, tree.children[i].y);
            this.cmd("Step");
            this.printTreeRec(tree.children[i], stringSoFar);
            this.cmd("Move", this.highlightID, tree.x, tree.y);
            this.cmd("SetText", this.printLabel2, stringSoFar);
            this.cmd("Step");

        }


    }
}

RadixTree.prototype.findCallback = function (event) {
    var findValue;

    var findValue = this.insertField.value.toUpperCase()
    findValue = findValue.replace(/[^a-z]/gi, '');
    this.findField.value = "";

    this.implementAction(this.findElement.bind(this), findValue);
}

RadixTree.prototype.findElement = function (findValue) {
    this.commands = [];
    this.cmd("SetText", 0, "Seaching for: ");
    this.cmd("SetText", 1, findValue);
    this.cmd("AlignRight", 1, 0);
    this.cmd("Step");
    this.highlightID = this.nextIndex++;


    var res = this.doFind(this.root, findValue);
    if (res) {
        this.cmd("SetText", 0, "String " + findValue + " found");
    } else {
        this.cmd("SetText", 0, "String " + findValue + " 未找到");
    }
    this.cmd("SetText", 1, "");
    this.cmd("SetText", 2, "");


    return this.commands;
}


RadixTree.prototype.doFind = function (tree, value) {
    if (tree == null) {
        this.cmd("SetText", 2, "Empty tree found.   String not in the tree");
        this.cmd("step");
        return null;
    }

    this.cmd("SetHighlight", tree.graphicID, 1);

    var remain = tree.wordRemainder

    var indexDifference = this.findIndexDifference(value, remain, tree.graphicID, 0);

    if (indexDifference == remain.length) {
        this.cmd("SetText", 2, "Reached the end of the prefix stored at this node");
        this.cmd("Step");

        if (value.length > indexDifference) {
            this.cmd("SetText", 2, "Recusively search remaining string  \nin the '" + value.charAt(indexDifference) + "' child");
            this.cmd("Step");
            this.cmd("SetHighlight", tree.graphicID, 0);
            this.cmd("SetText", 1, value.substring(indexDifference));

            var index = value.charCodeAt(indexDifference) - "A".charCodeAt(0);
            var noChild = tree.children[index] == null;


            if (noChild) {
                this.cmd("SetText", 2, "Child '" + value.charAt(indexDifference) + "' does not exit.  \nString is not in the tree.");
                this.cmd("Step");
                return null;

            } else {


                this.cmd("CreateHighlightCircle", this.highlightID, RadixTree.HIGHLIGHT_CIRCLE_COLOR, tree.x, tree.y);
                this.cmd("SetWidth", this.highlightID, RadixTree.NODE_WIDTH);

                this.cmd("Step")
                this.cmd("Move", this.highlightID, tree.children[index].x, tree.children[index].y);
                this.cmd("Step")

                this.cmd("Delete", this.highlightID);

            }


            return this.doFind(tree.children[index], value.substring(indexDifference));
        }

        this.cmd("SetText", 2, "Reached the end of the string.  Check if current node is \"True\"")
        this.cmd("Step");
        this.cmd("SetText", 2, "")

        if (tree.isword) {
            this.cmd("SetText", 2, "Node is \"True\", string is in tree")
            this.cmd("Step");
            this.cmd("SetText", 2, "")
            this.cmd("SetHighlight", tree.graphicID, 0);
            return tree;

        } else {
            this.cmd("SetText", 2, "Node is \"False\", string is not in tree")
            this.cmd("Step");
            this.cmd("SetText", 2, "")
            this.cmd("SetHighlight", tree.graphicID, 0);
            return null;

        }
    } else {
        this.cmd("SetText", 2, "Reached end of search string, \nStill characters remaining at node\nString not in tree")
        this.cmd("Step");
        this.cmd("SetHighlight", tree.graphicID, 0);
        this.cmd("SetText", 2, "")
        return null;


    }

}


RadixTree.prototype.deleteElement = function (deletedValue) {
    this.commands = [];
    this.cmd("SetText", 0, "正在刪除： ");
    this.cmd("SetText", 1, deletedValue);
    this.cmd("AlignRight", 1, 0);

    var node = this.doFind(this.root, deletedValue);

    if (node == null) {
        this.cmd("SetText", 2, "String not in the tree, nothing to delete");
        this.cmd("Step");
        this.cmd("SetText", 0, "");
        this.cmd("SetText", 1, "");
        this.cmd("SetText", 2, "");
    } else {
        node.isword = false;
        this.cmd("SetText", 2, "Found string to delete, setting node to \"False\"");
        this.cmd("Step");
        this.cmd("SetBackgroundColor", node.graphicID, RadixTree.FALSE_COLOR);
        this.cmd("Step");
        this.cleanupAfterDelete(node)
        this.cmd("SetText", 0, "");
        this.cmd("SetText", 1, "");
        this.cmd("SetText", 2, "");
    }

    return this.commands;
}


RadixTree.prototype.numChildren = function (tree) {
    if (tree == null) {
        return 0;
    }
    var children = 0
    for (var i = 0; i < 26; i++) {
        if (tree.children[i] != null) {
            children++;
        }
    }
    return children;

}


RadixTree.prototype.isLeaf = function (tree) {
    if (tree == null) {
        return false;
    }
    for (var i = 0; i < 26; i++) {
        if (tree.children[i] != null) {
            return false;
        }
    }
    return true;
}


RadixTree.prototype.getParentIndex = function (tree) {
    if (tree.parent == null) {
        return -1;
    }
    var par = tree.parent;
    for (var i = 0; i < 26; i++) {
        if (par.children[i] == tree) {
            return i;
        }
    }
    return -1;
}

RadixTree.prototype.cleanupAfterDelete = function (tree) {
    var children = this.numChildren(tree)

    if (children == 0 && !tree.isword) {
        this.cmd("SetText", 2, "Deletion left us with a \"False\" leaf\nRemoving false leaf");
        this.cmd("SetHighlight", tree.graphicID, 1);
        this.cmd("Step");
        this.cmd("SetHighlight", tree.graphicID, 0);
        if (tree.parent != null) {
            var index = 0
            while (tree.parent.children[index] != tree) {
                index++;
            }
            this.cmd("Disconnect", tree.parent.graphicID, tree.graphicID);
            this.cmd("Delete", tree.graphicID, 0);
            tree.parent.children[index] = null;
            this.cleanupAfterDelete(tree.parent);
        } else {
            this.cmd("Delete", tree.graphicID, 0);
            this.root = null;
        }
    } else if (children == 1 && !tree.isword) {
        var childIndex = -1;
        for (var i = 0; i < 26; i++) {
            if (tree.children[i] != null) {
                childIndex = i;
                break;
            }
        }
        this.cmd("SetText", 2, "Deletion left us with a \"False\" node\nContaining one child.  Combining ...");
        this.cmd("SetHighlight", tree.graphicID, 1);
        this.cmd("Step");
        this.cmd("SetHighlight", tree.graphicID, 0);

        var child = tree.children[childIndex];
        child.wordRemainder = tree.wordRemainder + child.wordRemainder;
        this.cmd("SetText", child.graphicID, child.wordRemainder);
        this.cmd("Disconnect", tree.graphicID, child.graphicID);

        if (tree.parent == null) {
            child.parent = null
            this.root = child;
            this.cmd("Delete", tree.graphicID);
        } else {
            var parIndex = this.getParentIndex(tree);
            this.cmd("Disconnect", tree.parent.graphicID, tree.graphicID);
            tree.parent.children[parIndex] = child;
            child.parent = tree.parent
            this.cmd("Connect", tree.parent.graphicID, child.graphicID, RadixTree.FOREGROUND_COLOR, 0, false, child.wordRemainder.charAt(0));
            this.cmd("Delete", tree.graphicID);

        }
        this.resizeTree();

    }


}


RadixTree.prototype.treeDelete = function (tree, valueToDelete) {

}

RadixTree.prototype.resizeTree = function () {
    this.resizeWidths(this.root);
    if (this.root != null) {
        var startingPoint = this.root.width / 2 + 1 + RadixTree.LeftMargin;
        this.setNewPositions(this.root, startingPoint, RadixTree.STARTING_Y);
        this.animateNewPositions(this.root);
        this.cmd("Step");
    }

}


RadixTree.prototype.add = function (word) {
    this.commands = new Array();
    this.cmd("SetText", 0, "Inserting; ");
    this.cmd("SetText", 1, word);
    this.cmd("AlignRight", 1, 0);
    this.cmd("Step");
    this.highlightID = this.nextIndex++;
    this.root = this.addR(word.toUpperCase(), this.root, RadixTree.LEFT_MARGIN + RadixTree.NODE_WIDTH / 2 + 1, RadixTree.STARTING_Y, 0);
    this.resizeTree();
    this.cmd("SetText", 0, "");
    this.cmd("SetText", 1, "");

    return this.commands;
}


RadixTree.prototype.addR = function (s, rt, startX, startY, wordIndex) {
    if (rt == null) {
        this.cmd("CreateCircle", this.nextIndex, s, RadixTree.NEW_NODE_X, RadixTree.NEW_NODE_Y);
        this.cmd("SetForegroundColor", this.nextIndex, RadixTree.FOREGROUND_COLOR);
        this.cmd("SetBackgroundColor", this.nextIndex, RadixTree.BACKGROUND_COLOR);
        this.cmd("SetWidth", this.nextIndex, RadixTree.NODE_WIDTH);
        this.cmd("SetText", 2, "Reached an empty tree.  Creating a node containing " + s);
        this.cmd("Step");
        this.cmd("SetText", 2, "");
        rt = new RadixNode(s, this.nextIndex, startX, startY)
        this.nextIndex += 1;
        rt.isword = true;
        return rt;
    }

    this.cmd("SetHighlight", rt.graphicID, 1);


    var indexDifference = this.findIndexDifference(s, rt.wordRemainder, rt.graphicID, wordIndex);

// 	this.cmd("CreateHighlightCircle", this.highlightID, BST.HIGHLIGHT_CIRCLE_COLOR, tree.x, tree.y);
//	this.cmd("Move", this.highlightID, tree.left.x, tree.left.y);
//        this.cmd("Step");


    if (indexDifference == rt.wordRemainder.length) {

        this.cmd("SetText", 2, "Reached the end of the prefix stored at this node");
        this.cmd("Step");

        if (s.length > indexDifference) {
            this.cmd("SetText", 2, "Recusively insert remaining string  \ninto the '" + s.charAt(indexDifference) + "' child");
            this.cmd("Step");
            this.cmd("SetHighlight", rt.graphicID, 0);
            this.cmd("SetText", 1, s.substring(indexDifference));


            // TODO: HIGHLIGHT CIRCLE!

            var index = s.charCodeAt(indexDifference) - "A".charCodeAt(0);
            var noChild = rt.children[index] == null;


            if (noChild) {
                this.cmd("SetText", 2, "Child '" + s.charAt(indexDifference) + "' does not exit.  Creating ...");
                this.cmd("Step");

            } else {


                this.cmd("CreateHighlightCircle", this.highlightID, RadixTree.HIGHLIGHT_CIRCLE_COLOR, rt.x, rt.y);
                this.cmd("SetWidth", this.highlightID, RadixTree.NODE_WIDTH);

                this.cmd("Step")
                this.cmd("Move", this.highlightID, rt.children[index].x, rt.children[index].y);
                this.cmd("Step")

                this.cmd("Delete", this.highlightID);
                // DO HIGHILIGHT CIRCLE THING HERE
            }


            var connect = rt.children[index] == null;
            rt.children[index] = this.addR(s.substring(indexDifference), rt.children[index], rt.x, rt.y, wordIndex + indexDifference);
            rt.children[index].parent = rt;
            if (connect) {
                this.cmd("Connect", rt.graphicID, rt.children[index].graphicID, RadixTree.FOREGROUND_COLOR, 0, false, s.charAt(indexDifference));
            }
            return rt;
        }
        this.cmd("SetText", 2, "Reached the end of the string.  Set Current node to \"True\"")
        this.cmd("Step");
        this.cmd("SetText", 2, "")

        this.cmd("SetBackgroundColor", rt.graphicID, RadixTree.BACKGROUND_COLOR);
        this.cmd("Step");
        this.cmd("SetHighlight", rt.graphicID, 0);

        rt.isword = true;
        return rt;
    }

    var firstRemainder = rt.wordRemainder.substring(0, indexDifference);
    var secondRemainder = rt.wordRemainder.substring(indexDifference);

    this.cmd("SetText", 2, "Reached a mismatch in prefix. \nCreate a new node with common prefix")

    this.cmd("CreateCircle", this.nextIndex, firstRemainder, RadixTree.NEW_NODE_X, RadixTree.NEW_NODE_Y);
    this.cmd("SetForegroundColor", this.nextIndex, RadixTree.FOREGROUND_COLOR);
    this.cmd("SetBackgroundColor", this.nextIndex, RadixTree.FALSE_COLOR);
    this.cmd("SetWidth", this.nextIndex, RadixTree.NODE_WIDTH);
    this.cmd("Step")

    var newNode = new RadixNode(firstRemainder, this.nextIndex, 0, 0);
    this.nextIndex += 1;

    newNode.wordRemainder = firstRemainder;

    var index = rt.wordRemainder.charCodeAt(indexDifference) - "A".charCodeAt(0);
    newNode.parent = rt.parent;
    newNode.children[index] = rt;
    if (rt.parent != null) {

        this.cmd("Disconnect", rt.parent.graphicID, rt.graphicID);
        this.cmd("Connect", rt.parent.graphicID, newNode.graphicID, RadixTree.FOREGROUND_COLOR, 0, false, newNode.wordRemainder.charAt(0));
        var childIndex = newNode.wordRemainder.charCodeAt(0) - 'A'.charCodeAt(0);
        rt.parent.children[childIndex] = newNode;
        rt.parent = newNode;

    } else {
        this.root = newNode;
    }
    this.cmd("SetHighlight", rt.graphicID, 0);

    rt.parent = newNode;

    this.cmd("SetText", 2, "Connect new node to the old, and reset prefix stored at previous node");

    this.cmd("Connect", newNode.graphicID, newNode.children[index].graphicID, RadixTree.FOREGROUND_COLOR, 0, false, rt.wordRemainder.charAt(indexDifference));
    rt.wordRemainder = secondRemainder;
    this.cmd("SetText", rt.graphicID, rt.wordRemainder);
    this.cmd("Step");


    this.resizeTree();

    if (indexDifference == s.length) {
        newNode.isword = true;
        this.cmd("SetBackgroundColor", newNode.graphicID, RadixTree.BACKGROUND_COLOR);
    } else {
        this.cmd("SetBackgroundColor", newNode.graphicID, RadixTree.FALSE_COLOR);
        index = s.charCodeAt(indexDifference) - "A".charCodeAt(0)
        this.cmd("SetText", 1, s.substring(indexDifference));

        newNode.children[index] = this.addR(s.substring(indexDifference), null, rt.x, rt.y, indexDifference + wordIndex);
        newNode.children[index].parent = newNode;
        this.cmd("Connect", newNode.graphicID, newNode.children[index].graphicID, RadixTree.FOREGROUND_COLOR, 0, false, s.charAt(indexDifference));

    }
    return newNode;
}

RadixTree.prototype.setNewPositions = function (tree, xPosition, yPosition) {
    if (tree != null) {
        tree.x = xPosition;
        tree.y = yPosition;
        var newX = xPosition - tree.width / 2;
        var newY = yPosition + RadixTree.HEIGHT_DELTA;
        for (var i = 0; i < 26; i++) {
            if (tree.children[i] != null) {
                this.setNewPositions(tree.children[i], newX + tree.children[i].width / 2, newY);
                newX = newX + tree.children[i].width;
            }
        }
    }

}
RadixTree.prototype.animateNewPositions = function (tree) {
    if (tree != null) {
        this.cmd("Move", tree.graphicID, tree.x, tree.y);
        for (var i = 0; i < 26; i++) {
            this.animateNewPositions(tree.children[i])
        }
    }
}

RadixTree.prototype.resizeWidths = function (tree) {
    if (tree == null) {
        return 0;
    }
    var size = 0;
    for (var i = 0; i < 26; i++) {
        tree.childWidths[i] = this.resizeWidths(tree.children[i]);
        size += tree.childWidths[i]
    }
    tree.width = Math.max(size, RadixTree.NODE_WIDTH + 4)
    return tree.width;
}


function RadixNode(val, id, initialX, initialY) {
    this.wordRemainder = val;
    this.x = initialX;
    this.y = initialY;
    this.graphicID = id;
    this.children = new Array(26);
    this.childWidths = new Array(26);
    for (var i = 0; i < 26; i++) {
        this.children[i] = null;
        this.childWidths[i] = 0;
    }
    this.width = 0;
    this.parent = null;
    this.isword = false;
}

RadixTree.prototype.disableUI = function (event) {
    this.insertField.disabled = true;
    this.insertButton.disabled = true;
    this.deleteField.disabled = true;
    this.deleteButton.disabled = true;
    this.findField.disabled = true;
    this.findButton.disabled = true;
    this.printButton.disabled = true;
}

RadixTree.prototype.enableUI = function (event) {
    this.insertField.disabled = false;
    this.insertButton.disabled = false;
    this.deleteField.disabled = false;
    this.deleteButton.disabled = false;
    this.findField.disabled = false;
    this.findButton.disabled = false;
    this.printButton.disabled = false;
}


var currentAlg;

function init() {
    var animManag = initCanvas();
    currentAlg = new RadixTree(animManag, canvas.width, canvas.height);

}
